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如何觀察大樹折斷, 不良生長情況【樹木專家話你知2009編輯】
1.) 按時觀察樹木, 如每週或兩週一次。
程序:
(一.) 在正常生長期突然大量樹葉被蟲吃掉。
(二.) 在正常生長期突然大量樹葉變黃枯落。(除季節落葉)
(三.) 在正常生長期幼葉不能正常生長變形。
(四.) 在正常生長期發現大量毛蟲。
(五.) 開始發現小量枯枝。
(六.) 發現較大的樹枝枯萎、光禿。 這時我們須要切斷枯枝, 看切口有沒有被蟲蛀。(地上有沒有蟲糞、木屑)
(七.) 大樹枝或樹幹出現蟲蛀的自然反應 --- 流膠。
(八.) 樹幹、大小樹枝如沒有樹葉, 用小刀輕割樹皮, 發現韌皮部、形成層, 枯黃
而沒有青綠水份, 可証明死亡。(請即切斷枯黃部份至有青綠有生機的韌皮部、形成層) 否則樹枝死亡會受蟲蛀害, 腐爛向下侵食至全樹。

2.) 其他觀察:
(一.) 樹冠過大受風力影響, 要修細樹冠。
(二.) 樹身比以前，有傾斜較大的比較。
(三.) 樹皮爆裂, 傷口廣大。
(四.) 樹身出現真菌。 (如木耳)
(五.) 樹木附近出現蟻洞、鼠洞。
(六.) 樹木附近地下出現裂紋。
How Observes the Big Tree to Break off--------Wong Man Sing
How observes the big tree to break off, grows not good situation
A.) Observes the trees on time, like each week or fortnightly.
Procedure:
(1) Is eaten suddenly in the normal vegetal period massive leaves by the insect.
(2) Changes suddenly in the normal vegetal period massive leave yellow withers and falls. (Eliminates season fallen leaf)
(3) In the normal vegetal period young leaf cannot the normal growth distortion.
(4) In normal vegetal period discovery massive larva aculeatas.
(5) Starts to discover the small amount deadwood.
(6) The discovery big branch withers bare. By now our had to have to shut off the deadwood, looked the margin did have is been destroyed by insects. (Ground has insect excrement, sawdust)
(7) The big branch or the bough appear the spontaneous reaction which is destroyed by insects --- Gummosis.
(8) The bough, the size branch like do not have the leaf, shears the bark lightly with the knife, discovers the phloem, the cambium, but withered and yellow does not have the dark green moisture, may prove the death. Otherwise (please be cut-off withered and yellow part to do have dark green has vitality phloem, cambium) the branch death can receive is destroyed by insects the evil, downward invades the food rottenly to the entire tree.
B.) Other observations:
(1) The crown too seriously Wind Effects to repair a fine crown
(2) Tree trunk compared to before, has the inclined big comparison. (3) The bark ruptures, the wound are general.
(4) The tree trunkappears the fungus. (For example auricularia auricula)
(5) Nearby the trees appears the ant hole, the rat-hole.
(6) Nearby the trees underground appears the crack.